169、The sealant burns at 109 deg.

1320、Head aircraft into the wind.

1319、Before you put new oil in the system, it is mandatory to replace the filter.

1318、The circuit breakers are installed on the rear of the unit.

1317、Personnel must procedure.

1316、If the drain hole is clogged, clean it.

1315、Do the troubleshooting procedure to find the cause of the malfunction.

1314、Calculate the thickness of the shim as follows: t=f x-y s

1313、Be careful when you move jet pipes or exhaust cones that have insulating blankets.

1312、Basically, writers can use the approved words in the dictionary as core vocabulary.

1311、Apply sealant on the outer surface